Re: linux-next: Tree for May 7 (openrisc, sparc qemu BUG due to 'hrtimer: Get rid of hrtimer softirq')

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On Thu, May 07, 2015 at 04:47:15PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> Changes since 20150506:
> 
> The ext4 tree gained a build failure so I used the version from
> next-20150506.
> 
> The vfs tree gained a conflict against the f2fs tree.
> 
> The rcu tree gained conflicts against the tip tree.
> 
> Non-merge commits (relative to Linus' tree): 2460
>  2454 files changed, 114321 insertions(+), 47105 deletions(-)
> 
> ----------------------------------------------------------------------------
> 
Seen when running openrisc target in qemu:

Switched to clocksource openrisc_timer
BUG: failure at kernel/irq_work.c:135/irq_work_run_list()!
Kernel panic - not syncing: BUG!
---[ end Kernel panic - not syncing: BUG!


A similar crash with the same BUG is seen with sparc smp qemu tests.

kernel BUG at kernel/irq_work.c:135!

---

Bisect results (with openrisc):

groeck@server:~/src/linux-next$ git bisect log
# bad: [55a92d585bd9150b7bd06882e0579a943a22c356] Add linux-next specific files for 20150507
# good: [5ebe6afaf0057ac3eaeb98defd5456894b446d22] Linux 4.1-rc2
git bisect start 'HEAD' 'v4.1-rc2'
# good: [3ef136d5df42c848c119a0266b9e5dcae3f3625b] Merge remote-tracking branch 'crypto/master'
git bisect good 3ef136d5df42c848c119a0266b9e5dcae3f3625b
# bad: [568bb11854cb689cbf86f8c4cc53513015de7eef] Merge remote-tracking branch 'tip/auto-latest'
git bisect bad 568bb11854cb689cbf86f8c4cc53513015de7eef
# good: [7ecea282683c4c6e6a10d4ff52592b7967e620c7] Merge remote-tracking branch 'sound-asoc/for-next'
git bisect good 7ecea282683c4c6e6a10d4ff52592b7967e620c7
# bad: [c8e3463dc8205ae221669bb96724cda6aec1d9cd] Merge branch 'x86/apic'
git bisect bad c8e3463dc8205ae221669bb96724cda6aec1d9cd
# good: [bab97bf0d8e9e137c9f3f5f88c70dee0edfc2d2b] Merge branch 'sched/urgent'
git bisect good bab97bf0d8e9e137c9f3f5f88c70dee0edfc2d2b
# good: [ab76085ec0858d4c2707ea0d036db00ef4aee8fd] x86,ioapic: Cleanup irq_trigger/polarity()
git bisect good ab76085ec0858d4c2707ea0d036db00ef4aee8fd
# bad: [ccdd92c17e144c8494f4c94ab85b48d297545cec] rtmutex: Remove bogus hrtimer_active() check
git bisect bad ccdd92c17e144c8494f4c94ab85b48d297545cec
# good: [c320642e1ced3b81592610e374894fea995f475b] timerqueue: Let timerqueue_add/del return information
git bisect good c320642e1ced3b81592610e374894fea995f475b
# bad: [514c2304b4574dae28c3d7c0ad6b9cf296994140] x86: perf: Use hrtimer_start()
git bisect bad 514c2304b4574dae28c3d7c0ad6b9cf296994140
# bad: [afc08b15cc2a3d2c48cbd427be8e0eea05698363] tick: sched: Remove hrtimer_active() checks
git bisect bad afc08b15cc2a3d2c48cbd427be8e0eea05698363
# good: [895bdfa793f6e912d1a58fc445b3dd4d686f7bd3] hrtimer: Keep pointer to first timer and simplify __remove_hrtimer()
git bisect good 895bdfa793f6e912d1a58fc445b3dd4d686f7bd3
# bad: [c6eb3f70d4482806dc2d3e1e3c7736f497b1d418] hrtimer: Get rid of hrtimer softirq
git bisect bad c6eb3f70d4482806dc2d3e1e3c7736f497b1d418
# first bad commit: [c6eb3f70d4482806dc2d3e1e3c7736f497b1d418] hrtimer: Get rid of hrtimer softirq

Guenter
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